Numerical simulation of temperature field based on muti-wire longitudinal submerged arc welding
Multi-wire submerged arc welding has been widely commercialized in joining line pipe. Generally, welding temperature field determines microstructure evolution. It is important to understand the temperature field of HAZ. This study adopts SYSWELD welding finite element software, treated each wire as an independent heat source according to welding process parameters. The physical properties parameters variation of the material with temperature and phase transformation of hot process was considered. Then a computational model was developed to acquire the thermal cycles of temperature field .This research took steel grade X80 as an example, the SAW process under consideration is for the manufacture of a line pipe 914mm in diameter and 38mm in wall thickness, simulated the welding thermal process of it .To validate FE model, Temperature measuring experiment of this pipe size were subjected on production line. The shape of the molten pool predicted by numerical analysis is compared with the results obtained through measuring the joint and molten pool dimensions. The comparison shows that they are in good agreement, the accuracy of the calculation results were confirmed; finally the change rules of temperature field were discussed.
Muti-wire submerged arc welding heat source model welding thermal process temperature field
Hong Zhang HaiChao Hu XiuLin Han Bo Zhao LiNa Zhang KeYong Liu
Bohai Equipment Research Institute Steel Pipe Research Institute, Qingxian 062658, Hebei, China Nati School of Materials Science and Engineering, Tianjin University, Tianjin 300192, China Bohai Equipment Julong Steel Pipe, Qingxian 062658, Hebei, China
国际会议
济南
英文
1-12
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）